48 REPORT OF NEW JERSEY STATE MUSEUM. 



Family GYROPID^E. 



Similar to the preceding; but the tarsi have only a single claw and the 

 species occur on mammals only. 



GYROPUS Nitzsch. 



G. oval is Nitzsch. Occurs on the Guinea pig. 



G. gracilis Nitzsch. Occurs with the preceding. Of course, these species 

 are not really natives of the State, but the host animals are some- 

 times raised as pets and for other purposes and the parasites follow 

 them, as do those of other domesticated animals. 



